The official idol clothes introduced in the 2022 2nd ACT "GREAT VOYAGE to UNIVERSE!!" and worn by the original 9 HOLOSTARS members. It is designed by Nozaki Tsubata.
See post #5624490
It consists of a long-sleeved white collared shirt, high-waist black pants, a gold-trimmed black jacket with notched lapels and flaps in the back, a double-breasted black vest, a cape, a necktie, a medal, and black lace-up knee boots. The color of the cape, necktie, and accent colors differ to match each talent's theme color. They also wear black headwear, but different models for each generation: